Turbocharged engine control device

Abstract

Provided is a turbocharged engine control device capable of controlling an engine to accurately realize vehicle behavior intended by a driver, while suppressing deterioration in acceleration response. The turbocharged engine control device comprises: a basic target torque-determining part (61) configured to determine a basic target torque based on a driving state of a vehicle including manipulation of an accelerator pedal; a torque reduction amount-determining part (63) configured to determine a torque reduction amount based on a driving state of the vehicle other than the manipulation of the accelerator pedal; a final target torque-determining part (65) configured to determine a final target torque based on the basic target torque and the torque reduction amount; and an engine control part (69) configured to control the engine to output the final target torque, while controlling the turbocharger based on the final target torque, wherein the engine control part (69) is configured to restrict controlling the turbocharger (5) according to a change in the final target torque corresponding to a change in the torque reduction amount.

What is claimed is: 
     
         1 . A turbocharged engine control device for controlling an engine comprising at least a turbocharger, based on a driving state of a vehicle mounting the engine, comprising:
 a basic target torque-determining part configured to determine a basic target torque based on a driving state of the vehicle including manipulation of an accelerator pedal;   a torque reduction amount-determining part configured to determine a torque reduction amount based on a driving state of the vehicle other than the manipulation of the accelerator pedal;   a final target torque-determining part configured to determine a final target torque based on the basic target torque and the torque reduction amount; and   an engine control part configured to control the engine to output the final target torque and configured to control the turbocharger based on the final target torque,   wherein the engine control part is configured to restrict controlling the turbocharger according to a change in the final target torque corresponding to a change in the torque reduction amount.   
     
     
         2 . The turbocharged engine control device as recited in  claim 1 , wherein the engine control part is configured to control the turbocharger based on a state of the engine in which the engine is operated to output the basic target torque. 
     
     
         3 . The turbocharged engine control device as recited in  claim 1 , wherein the torque reduction amount-determining part is configured to determine the torque reduction amount according to manipulation of a steering wheel of the vehicle. 
     
     
         4 . The turbocharged engine control device as recited in  claim 3 , wherein the torque reduction amount-determining part is configured to determine the torque reduction amount such that, as a steering speed of the vehicle becomes larger, the torque reduction amount is gradually increased, and an increase rate of the torque reduction amount is gradually reduced. 
     
     
         5 . The turbocharged engine control device as recited in  claim 1 , wherein the basic target torque-determining part is configured to determine a target acceleration of the vehicle based on the driving state of the vehicle including the manipulation of the accelerator pedal, and then determine the basic target torque based on the target acceleration. 
     
     
         6 . The turbocharged engine control device as recited in  claim 1 , wherein the engine is a diesel engine comprising a fuel injection device for injecting fuel into a cylinder, and wherein the engine control part is configured to control the fuel injection device to regulate a fuel injection amount so as to enable the diesel engine to output the final target torque. 
     
     
         7 . The turbocharged engine control device as recited in  claim 1 , wherein the engine is a gasoline engine comprising an air-amount regulating device for regulating an amount of air to be introduced into a cylinder, and an ignition device for igniting an air-fuel mixture in the cylinder, and wherein the engine control part is configured to control the air-amount regulating device to regulate the amount of air to be introduced into the cylinder and/or control the ignition device to regulate an ignition timing, so as to enable the gasoline engine to output the final target torque.